http://www.greatwardifferent.com/Great_War/French/Loivre_01.htm
http://www.vac-acc.gc.ca/general_f/sub.cfm?source=history/firstwar/1diary/bottomley/april1918
http://perso.wanadoo.fr/jlf.site/Vouziers.htm
http://www.liberation.fr/page.php?Article=270242
http://www.stratisc.org/partenaires/cfhm/rihm/76/rihm_76_Hinterlangwps.html
http://perso.wanadoo.fr/jlf.site/regnieville.htm